Siemens ISI EN 50295 - Manual (Page 18)

Siemens IK PI · 2004 6/18
AS-Interface
AS-Interface cable-operated switches
AS-Interface Safety at work
6
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Overview
It is also possible to connect AS-Interface cable-operated
switches via the standard AS-Interface with safety-oriented com-
munication.
In this case, the safety functions no longer have to be conven-
tionally wired up.
■
Application
SIGUARD cable-operated switches are used for monitoring or
for EMERGENCY-STOP facilities on particulary endangered sys-
tem sections.
As the effective range of a cable-operated switch is limited by
the length of the cord, large systems can also be protected.
Specifications
Switches with latching for implementation in EMERGENCY-STOP
equipment correspond to the EN 418 standard.
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Function
The safety contacts of the AS-Interface cable-operated switch
are positively driven.
The AS-Interface cable-operated switches are ready to operate
after pretensioning of the pull-wire or the rope.
When the rope is pretensioned, it must be released before the
cable-operated switch can be returned to the original state.
■
Selection and Ordering data
1) Accessories, technical specifications, contact travel, circuit diagrams
and dimensional drawings are given for the specified basic switch in
Catalog LV 10 Section AS-Interface Safety Systems
Design Order No.
AS-Interface cable-operated switch
With direct connection of AS-Interface to Safety at Work
Metal housing with dust protection
Implementable up to Category 4 to EN 954-1
IP65
Latching to EN 418
Pushbutton release
2 NC contacts
• For cable lengths up to 10 m,
with adjustment window
3SF2 120-1BF00-0BA1
• For cable lengths up to 25 m,
with adjustment window
3SF2 150-1BF00-0BA1
• For cable lengths up to 50 m 3SF2 140-1BF00-0BA1
Forced opening IEC 60 947-5-1, Appendix K.